Early this morning, WolframAlpha launched on Windows Phone 8.1 for $2.99. As many of you noticed, the Store listing showed it as being available for Windows as well. At the time, tracking down the Windows Store link was a bit tough, but later on it became available.
We are also happy to report that this fits in with the universal apps model that Microsoft is putting forth with its Windows 10 vision. So although the app is still $2.99, that cost covers both Windows and Windows Phone versions of the app. We just purchased the Windows 8.1 app, and when we went to 'buy' the Windows Phone one, we were informed we had already paid for it.
Full story from the WindowsCentral blog...